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Slop
====
Slop is a simple option parser with an easy to remember syntax and friendly API.
[](http://travis-ci.org/injekt/slop)
Installation
------------
### Rubygems
gem install slop
### GitHub
git clone git://github.com/injekt/slop.git
gem build slop.gemspec
gem install slop-<version>.gem
Usage
-----
```ruby
# parse assumes ARGV, otherwise you can pass it your own Array
opts = Slop.parse do
banner "ruby foo.rb [options]\n"
on :name=, 'Your name'
on :p, :password, 'Your password', :argument => :optional
on :v, :verbose, 'Enable verbose mode'
end
# if ARGV is `--name Lee -v`
opts.verbose? #=> true
opts.password? #=> false
opts[:name] #=> 'lee'
```
Slop supports several methods of writing options:
```ruby
# These options all do the same thing
on '-n', '--name', 'Your name', :argument => true
on 'n', :name=, 'Your name'
on :n, '--name=', 'Your name'
# As do these
on 'p', '--password', 'Your password', :argument => :optional
on :p, :password, 'Your password', :optional_argument => true
on '-p', 'password=?', 'Your password'
```
You can also return your options as a Hash:
```ruby
opts.to_hash #=> { :name => 'lee', :verbose => true, :password => nil }
```
Printing Help
-------------
Slop attempts to build a good looking help string to print to your users. You
can see this by calling `opts.help` or simply `puts opts`.
Configuration Options
---------------------
All of these options can be sent to `Slop.new` or `Slop.parse` in Hash form.
* `strict` - Enable strict mode. When processing unknown options, Slop will
raise an `InvalidOptionError`. **default:** *false*.
* `help` - Automatically add the `--help` option. **default:** *false*.
* `banner` - Set this options banner text. **default:** *nil*.
* `ignore_case` - When enabled, `-A` will look for the `-a` option if `-A`
does not exist. **default:** *false*.
* `autocreate` - Autocreate options on the fly. **default:** *false*.
* `arguments` - Force all options to expect arguments. **default:** *false*.
* `optional_arguments` - Force all options to accept optional arguments.
**default:** *false*.
* `multiple_switches` - When disabled, Slop will parse `-abc` as the option `a`
with the argument `bc` rather than 3 separate options. **default:** *true*.
* `longest_flag` - The longest string flag, used to aid configuring help
text. **default:** *0*.
Features
--------
Check out the following wiki pages for more features:
* [Ranges](https://github.com/injekt/slop/wiki/Ranges)
* [Auto Create](https://github.com/injekt/slop/wiki/Auto-Create)
Woah woah, why you hating on OptionParser?
------------------------------------------
I'm not, honestly! I love OptionParser. I really do, it's a fantastic library.
So why did I build Slop? Well, I find myself using OptionParser to simply
gather a bunch of key/value options, usually you would do something like this:
```ruby
require 'optparse'
things = {}
opt = OptionParser.new do |opt|
opt.on('-n', '--name NAME', 'Your name') do |name|
things[:name] = name
end
opt.on('-a', '--age AGE', 'Your age') do |age|
things[:age] = age.to_i
end
# you get the point
end
opt.parse
things #=> { :name => 'lee', :age => 105 }
```
Which is all great and stuff, but it can lead to some repetition. The same
thing in Slop:
```ruby
require 'slop'
opts = Slop.parse do
on :n, :name=, 'Your name'
on :a, :age=, 'Your age', :as => :int
end
opts.to_hash #=> { :name => 'lee', :age => 105 }
```
|
